before you can spread ANYTHING over jelly fish stings, you have to neutralize the poison that was injected...ammonia is the one thing that will do that very quickly. Which is why urine, which is mostly ammonia, works so well. Just about any scuba diving first aid kit will contain a small vial of ammonia just for that purpose.

As far as Man of War jellies...ooo yeah..we get those in certain times of the year en masse, on the Texas coast. You can drive your car along and hear them all popping under your tires...Bad thing about those is the tentacles are sooooooooooo long that the jelly body can be far up on the beach and the tentacles can still be in the water or elsewhere in the sand and still be active even tho the jelly is long dead.

Grant me the senility to forget the people I never liked,the good fortune to run into the ones I do,and the eyesight to tell the difference.